A San Fran­cis­co city super­vi­sor has pro­posed car shar­ing for city work­ers as a cost-sav­ings mea­sure and way to replace under­uti­lized fleet vehi­cles.

Under the pro­pos­al, which was intro­duced last week, pas­sen­ger vehi­cles and light-duty trucks in the city’s fleet would be replaced over the next 13 years and replaced with con­tracts with pri­vate car-shar­ing com­pa­nies such as Zip­car or City Car­Share. The pro­pos­al would not apply to fire trucks, police cars, Depart­ment of Pub­lic Works main­te­nance vehi­cles or oth­er spe­cial­ized equip­ment.

A large por­tion of the sav­ings under Super­vi­sor Mark Farrell’s plan would come from auc­tion­ing off the under­uti­lized vehi­cles. The city plans to install telem­at­ics in city-owned and leased cars to mon­i­tor usage. The city’s total fleet con­sists of 7,152 vehi­cles. The city hasn’t spec­i­fied how many fleet vehi­cles could be elim­i­nat­ed.

San Fran­cis­co is fol­low­ing Chicago’s lead on the car-shar­ing pro­gram. In 2011, Chica­go imple­ment­ed the pro­gram in its pub­lic sec­tor. Chica­go reduced its fleet from 1,000 to 650 and saved an esti­mat­ed $7 mil­lion over three years, accord­ing to the San Fran­cis­co Appeal.

If Farrell’s pro­pos­al is approved by the city’s Board of Super­vi­sors, the process of phas­ing out the 7,152-vehicle fleet could start as ear­ly as Decem­ber, reports Reuters. The board plans to vote on the ordi­nance in Octo­ber.